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 "cells": [
  {
   "cell_type": "markdown",
   "id": "21cca4f9",
   "metadata": {},
   "source": [
    "* 2022/10/11week08\n",
    "* Python 课堂笔记"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "af31ff1b",
   "metadata": {},
   "source": [
    "# 本周内容\n",
    "> 0. 代码的注释\n",
    "> 1. 用户输入\n",
    "> 2. 格式化文本信息"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "cb4cd229",
   "metadata": {},
   "source": [
    "# 0. 代码的注释\n",
    "> 1. #,一般写在代码块的最上边，或者一行代码的最后，用于代码思路的记录。"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "f7ca69e5",
   "metadata": {},
   "source": [
    "> 2. '''注释内容'''，一般是注释代码块"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "7eab9a8d",
   "metadata": {},
   "source": [
    "## 1. 用户输入\n",
    "> 1. input()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "67eb1473",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "账号:admin\n",
      "密码:12345\n",
      "admin\n",
      "12345\n"
     ]
    }
   ],
   "source": [
    "# 登录系统\n",
    "username = input(\"账号:\")\n",
    "password = input(\"密码:\")\n",
    "\n",
    "\n",
    "print(username)\n",
    "print(password)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "0edc6ce3",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "账号:admin\n",
      "密码:12245\n",
      "欢迎admin登录！\n"
     ]
    }
   ],
   "source": [
    "# 登录系统\n",
    "# 假设我们数据库有用户信息：账号：admin,密码：123456\n",
    "userl = \"admin\"\n",
    "password = \"123456\"\n",
    "\n",
    "username = input(\"账号:\")\n",
    "password = input(\"密码:\")\n",
    "\n",
    "# 情景一：输入信息正确，登录成功\n",
    "if userl == username and password == password:\n",
    "    print(\"欢迎\"+userl+\"登录！\")\n",
    "\n",
    "# 情景二：账号不存在或密码不正确\n",
    "else:\n",
    "    print(\"账号不存在或密码不正确\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "549f7b49",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "账号:admin\n",
      "密码:123435\n",
      "账号不存在或密码不正确!\n",
      "您还有2次尝试的机会\n",
      "账号:admin\n",
      "密码:12345\n",
      "账号不存在或密码不正确!\n",
      "您还有1次尝试的机会\n",
      "账号:admin\n",
      "密码:12245\n",
      "三次输入失败，请1小时后再来尝试\n"
     ]
    }
   ],
   "source": [
    "# 登陆系统 迭代2 ：增加循环功能\n",
    "# 假设我们数据库有用户信息：账号：admin，密码，123456\n",
    "user1 = \"admin\"\n",
    "password1 = \"123456\"\n",
    "\n",
    "for i in range(3,0,-1):  # i 是一个 int\n",
    "    username = input(\"账号:\")\n",
    "    password = input(\"密码:\")\n",
    "\n",
    "    # 情景一：输入信息正确，登陆成功\n",
    "    if user1 == username and password1 == password:\n",
    "        print(\"欢迎\"+user1+\"登录！\")\n",
    "        break # 终止循环\n",
    "    # 情景二：账号不存在或密码不正确\n",
    "    else:\n",
    "        if i == 1:\n",
    "            print(\"三次输入失败，请1小时后再来尝试\")\n",
    "        else:\n",
    "            print(\"账号不存在或密码不正确!\")\n",
    "            print(\"您还有\"+str(i-1)+\"次尝试的机会\") "
   ]
  },
  {
   "cell_type": "markdown",
   "id": "1c799ad8",
   "metadata": {},
   "source": [
    "# 2. 格式化输出\n",
    "> 1. 字符串拼接\n",
    "> 2. 占位符\n",
    "> 3. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "b96a97bd",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "姓名：wxm\n",
      "年龄：30\n",
      "工作：it\n",
      "收入：2000\n",
      "地区：gz \n",
      "-----INFO OF wxm------\n",
      "年龄：30\n",
      "工作：it\n",
      "收入：2000\n",
      "地区：gz \n"
     ]
    }
   ],
   "source": [
    "# 用户注册系统 方法一：字符串拼接\n",
    "name = input(\"姓名：\")\n",
    "age = input(\"年龄：\")\n",
    "job = input(\"工作：\")\n",
    "salary = input(\"收入：\")\n",
    "reg = input(\"地区：\")\n",
    "\n",
    "info = '''-----INFO OF '''+ name +'''------'''+'''\n",
    "年龄：'''+age+'''\n",
    "工作：'''+job+'''\n",
    "收入：'''+salary+'''\n",
    "地区：'''+reg\n",
    "\n",
    "print(info)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "718acc91",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "姓名：wxm\n",
      "年龄：30\n",
      "工作：it\n",
      "收入：gz\n",
      "地区：gz\n"
     ]
    }
   ],
   "source": [
    "# 用户注册系统 方法二：占位符 %s str, 依次有序输入\n",
    "name = input(\"姓名：\")\n",
    "age = int(input(\"年龄：\")) # 强制将 str 转换成 int\n",
    "job = input(\"工作：\")\n",
    "salary = input(\"收入：\")\n",
    "reg = input(\"地区：\")\n",
    "\n",
    "info = '''-----INFO OF %s------\n",
    "姓名：%s\n",
    "年龄：%d\n",
    "工作：%s\n",
    "收入：%s\n",
    "地区：%s'''%(name,name,age,job,salary,reg)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "924f4c06",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "请输入您的余额200\n",
      "开始购物\n"
     ]
    }
   ],
   "source": [
    "while True:\n",
    "    balance_old = input(\"请输入您的余额\")\n",
    "    if not balance_old.isdigit():   # .isdigit，判断余额是否为数字\n",
    "        print(\"输入格式错误，请重新输入\")\n",
    "    else:\n",
    "        print(\"开始购物\")\n",
    "        balance_old = int(balance_old)\n",
    "        break\n",
    "balance_new = balance_old\n",
    "balance_new = int(balance_new)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "622c27de",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 商品列表\n",
    "product_list = [\n",
    "[\"巧克力\",100],    \n",
    "[\"牛奶\",150],\n",
    "[\"水果\",80],\n",
    "]\n",
    "\n",
    "shopping_list = []"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "eb9128e6",
   "metadata": {},
   "outputs": [],
   "source": [
    "while True:\n",
    "    # 生成带序号的商品列表  enumerate,枚举\n",
    "    for index, item in enumerate(product_list):\n",
    "        print(index + 1, item)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "ec13bf2c",
   "metadata": {},
   "outputs": [],
   "source": [
    "  enter = input(\"请输入您所需要的商品编号，或者按 r 退出购物\")\n",
    "    if enter.isdigit():\n",
    "        enter = int(enter)\n",
    "\n",
    "        if enter <= len(product_list) and enter > 0:\n",
    "            print(\"您要购买的是\",product_list[enter - 1][0])\n",
    "            if balance_new >= product_list[enter - 1][1]:\n",
    "                shopping_list.append(product_list[enter - 1][0])\n",
    "                balance_new -= product_list[enter - 1][1]\n",
    "                print(\"您已购买\" + product_list[enter - 1][0] + \",您的余额为\" + str(balance_new))\n",
    "            else:\n",
    "                print (\"您的余额不足，购买失败\")\n",
    "                print(\"您现在的余额为:\" + str(balance_new))\n",
    "            else:\n",
    "            print(\"您所输入的编号为错误编号，请重新输入\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "f339a3ce",
   "metadata": {},
   "outputs": [],
   "source": [
    "elif enter == \"r\":\n",
    "        if balance_new == balance_old:\n",
    "            print(\"您没有购买任何商品，您的余额为\" + str(balance_new))\n",
    "        else:\n",
    "            print(\"已退出购物，您的余额为\" + str(balance_new))\n",
    "            print(\"以下是您所购买的商品\" + str(shopping_list))\n",
    "        break    "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "576af1d1",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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